“It’s a pretty laid-back life most of the time,” Everett says. He described a typical day for the Pirahã: A man might get up, spend a few hours canoeing and fishing, have a barbecue, go for a swim, bring fish back to his family, and play until the evening. Such subsistence living is surely not without its own set of worries, but the anthropologist Marshall Sahlins argued in a 1968 essay that hunter-gathers belonged to “the original affluent society,” seeing as they only “worked” a few hours a day; Everett estimates that Pirahã adults on average work about 20 hours a week (not to mention without bosses peering over their shoulders). Meanwhile, according to the Bureau of Labor Statistics, the average employed American with children works about nine hours a day.

Does this leisurely life lead to the depression and purposelessness seen among so many of today’s unemployed? “I’ve never seen anything remotely like depression there, except people who are physically ill,” Everett says. “They have a blast. They play all the time.” While many may consider work a staple of human life, work as it exists today is a relatively new invention in the course of thousands of years of human culture. “We think it’s bad to just sit around with nothing to do,” says Everett. “For the Pirahã, it’s quite a desirable state.”

Gray likens these aspects of the hunter-gatherer lifestyle to the carefree adventures of many children in developed countries, who at some point in life are expected to put away childish things. But that hasn’t always been the case. According to Gary Cross’s 1990 book A Social History of Leisure Since 1600, free time in the U.S. looked quite different before the 18th and 19th centuries. Farmers—which was a fair way to describe a huge number of Americans at that time—mixed work and play in their daily lives. There were no managers or overseers, so they would switch fluidly between working, taking breaks, joining in neighborhood games, playing pranks, and spending time with family and friends. Not to mention festivals and other gatherings: France, for instance, had 84 holidays a year in 1700, and weather kept them from farming another 80 or so days a year.